Naraku 09311139 Cylinder-piston kitRef : NARK00144A / 09311139

Manufacturer Ref: NK102.57 — 70 cm³ NARAKU V.2 cylinder kit for Piaggio/Derbi D50B0 engines (Euro3).

This NARAKU 70 cm³ V.2 cylinder kit uses the mould adapted for the D50B0 block up to 2018 and is finished in silver for a look close to the original. It comes with a dedicated 70cc cylinder head, which has threads that accept temperature probes on Euro3 vehicles. The cylinder head is also compatible with Euro4 models using the thread adapter NK103.78 (sold separately).

• Usage: focused on torque and acceleration — designed for daily use rather than aiming for very high revs or maximum noise levels.
• Exhaust compatibility: suitable for both original exhausts and sports silencers.
• Carburettor adjustment: if the original carburettor is retained, an increase in the jet of about 7–10% (indicative value) is recommended. NARAKU suggests a 19 mm sport carburettor to optimise fuel delivery.
• Finish: silver paint that conceals the appearance compared to the original cylinder.

No additional technical specifications provided. Frequently compatible models: GILERA SMT 50 Drifting (2020), DERBI SENDA 50 SM X-Treme (2020), APRILIA SX 50 Factory (2020).